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CVE PROGRAM SOURCE RECORD5.3 Medium

CVE-2026-109284

Open WebUI 0.11.0 before 0.11.4 Improper Authorization via Chat Fork Endpoint

Description

Open WebUI from 0.11.0 before 0.11.4 contains an improper authorization vulnerability in the chat fork handler, which places forked chats in the source chat's folder without checking folder write access. Shared folder members downgraded to read-only can call POST /api/v1/chats/{id}/fork on chats they created there while they had write access, inserting attacker-controlled chats visible to the folder owner and members.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

open-webui open-webui

Default version status: unaffected

  • 0.11.0 to < 0.11.4affected
  • 0.11.4unaffected
pkg:pypi/open-webui

References